Heat capacities of one-dimensional Heisenberg antiferromagnets under high magnetic fields

Tatsuo Kobayashi, A. Koda, H. Honda, C. U. Hong, K. Amaya, T. Asano, Y. Ajiro, M. Mekata, T. Yosida

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Heat capacity measurements under magnetic fields are carried out on one-dimensional Heisenberg antiferromagnets, a spin-Peierls (SP) and Haldane gap system. In the SP system CuGeO3, the jump in the heat capacity corresponding to SP transition is observed under fields up to 13 T. The obtained field-temperature phase diagram is in good agreement with the previous results of magnetic measurements. The heat capacity follows the exponential temperature dependence at low temperatures under zero field, while it approaches T3-dependence under external field. The heat capacity of Haldane gap system NINO is almost the same as that of NENP. The energy gap at and above Hc is caused by the existence of the transverse moment.

Original languageEnglish
Pages (from-to)205-207
Number of pages3
JournalPhysica B: Condensed Matter
Volume211
Issue number1-4
DOIs
Publication statusPublished - May 1 1995
Externally publishedYes

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Specific heat
specific heat
Magnetic fields
magnetic fields
Magnetic variables measurement
Phase diagrams
magnetic measurement
Energy gap
Temperature distribution
temperature distribution
phase diagrams
moments
Temperature
temperature dependence

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Heat capacities of one-dimensional Heisenberg antiferromagnets under high magnetic fields. / Kobayashi, Tatsuo; Koda, A.; Honda, H.; Hong, C. U.; Amaya, K.; Asano, T.; Ajiro, Y.; Mekata, M.; Yosida, T.

In: Physica B: Condensed Matter, Vol. 211, No. 1-4, 01.05.1995, p. 205-207.

Research output: Contribution to journalArticle

Kobayashi, T, Koda, A, Honda, H, Hong, CU, Amaya, K, Asano, T, Ajiro, Y, Mekata, M & Yosida, T 1995, 'Heat capacities of one-dimensional Heisenberg antiferromagnets under high magnetic fields', Physica B: Condensed Matter, vol. 211, no. 1-4, pp. 205-207. https://doi.org/10.1016/0921-4526(94)00986-6
Kobayashi, Tatsuo ; Koda, A. ; Honda, H. ; Hong, C. U. ; Amaya, K. ; Asano, T. ; Ajiro, Y. ; Mekata, M. ; Yosida, T. / Heat capacities of one-dimensional Heisenberg antiferromagnets under high magnetic fields. In: Physica B: Condensed Matter. 1995 ; Vol. 211, No. 1-4. pp. 205-207.
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AU - Amaya, K.

AU - Asano, T.

AU - Ajiro, Y.

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